Seborrheic Dermatitis Slide #8, "0208-Seborrheic dermatitis" from Set #2 Disease: Seborrheic dermatitis Age: Unknown Notes: Seborrheic dermatitis of scalp. The lesions are red and covered with greasy scales. This patient reported intense itching, which is common in the scalp.

Atopic Dermatitis Slide #19, "0219-Atopic Dermatitis" from Set #2 Disease: Atopic Dermatitis Age: Adult (18-60) Notes: Atopic dermatitis presenting as chronic relapsing dermatitis of the dorsum of both hands in a 39-year-old woman with a family history of atopic dermatitis and allergic rhinitis.

Herpes Simplex Slide #48, "0248-Herpes simplex" from Set #2 Disease: Herpes simplex Age: Child Notes: Around the mouth of this 8-year-old boy are small grouped vesicles. The lesions were preceded by itching and burning a few hours before the eruption.

Ecthyma Slide #43, "0243-Ecthyma" from Set #2 Disease: Ecthyma Age: Adolescent/Young Adult (11-18) Notes: On the arm of this 12-year-old girl are evident small bullae and pustules on an erythematous base surmounted by a hard crust. Streptococcus pyogenes was identified as the etiologic agent.

Alopecia Areata Slide #31, "0231-Alopecia areata" from Set #2 Disease: Alopecia areata Age: Child Notes: In this 5-year-old child, an area of alopecia of the vertex is surrounded by normal hair. No inflammation or desquamation is evident on the affected skin.

Acanthosis Nigricans Slide #5, "0105-Acanthosis nigricans" from Set #1 Disease: Acanthosis nigricans Age: Adolescent/Young Adult (11-18) Notes: 11-year-old AAF presents with hyperpigmented velvet-like skin changes on her neck. Patient appears precocious with enlarged breasts, obesity, extensive acne vulgaris, and increased hair growth on the upper lip. Systemic disease: HAIR-AN Syndrome (Hyperandrogenicity, insulin-resistance and acanthosis nigricans).

Scleroderma Slide #25, "0125-Scleroderma" from Set #1 Disease: Scleroderma Age: Elderly Appearing Adult Notes: 65-year-old WM with long standing Raynaud's phenomenon presents with telangiectatic mats on his face and hands, perioral skin tightening and gastroesophagel reflux. Laboratory testing for anti-centromere antibody was positive. Systemic disease: Limited systemic sclerosis.

Tumoral Calcinosis Slide #14, "0114-Tumoral calcinosis" from Set #1 Disease: Tumoral calcinosis Age: Adult (18-60) Notes: 45-year-old white female with hard subcutaneous growths. The lesions associated with a joint limit its mobility. Her sister has a similar problem. Laboratory testing revealed hyperphosphatemia. Systemic disease: Inherited abnormality of phosphate metabolism.

Giant Congenital Nevus Slide #7, "0407-Giant nevocytic nevus" from Set #4 Class: Cutaneous Neoplasms Disease: Benign Melanocytic Proliferations Age: Adult (18-60) Race: Caucasian Image Type: Clinical Photograph

Histiocytic Lymphoma Slide #46, "0446-Histiocytic lymphoma" from Set #4 Class: Cutaneous Neoplasms Disease: Malignant Lymphoreticular/Hematologic/Neuroendocrine Neoplasms Age: Adult (18-60) Race: Caucasian Image Type: Clinical Photograph

Keratoacanthoma Slide #43, "0443-Keratoacanthoma on damaged skin" from Set #4 Class: Cutaneous Neoplasms Disease: Malignant Epithelial Neoplasms Age: Elderly Appearing Adult Race: Caucasian Image Type: Clinical Photograph

Trichoepitheliomas Slide #13, "0413-Trichoepitheliomas" from Set #4 Class: Cutaneous Neoplasms Disease: Benign Cutaneous Appendageal Proliferations Age: Adult (18-60) Race: Caucasian Image Type: Clinical Photograph

Adenoma Sebaceum Slide #15, "0415-Adenoma Sebaceum" from Set #4 Class: Miscellaneous Disorders and Other Topics Class 2: Cutaneous Neoplasms Disease: Heritable/Congenital Disorders and Miscellaneous Syndromes Disease 2: Benign Bony and Soft Tissue Proliferations Age: Adolescent/Young Adult (11-18) Race: Caucasian Image Type: Clinical Photograph

Acute Paronychia Slide #13, "1513-Acute Paronychia" from Set #15 Class: Miscellaneous Disorders and Other Topics Class 2: Infections Infestations and Environmental Factors Disease: Appendageal Disorders Disease 2: Bacterial Mycobacterial and Spirochetal Infection Age: Unknown Race: Caucasian Image Type: Clinical Photograph

Median Canal Dystrophy Slide #1, "1501-Median Canal Dystrophy Habit Tic" from Set #15 Class: Miscellaneous Disorders and Other Topics Disease: Appendageal Disorders Disease 2: Neuropsychiatric Cutaneous Disorders Age: Adult (18-60) Race: Caucasian Image Type: Clinical Photograph

Impetigo Slide #2, "1202-Impetigo" from Set #12 Class: Infections Infestations and Environmental Factors Disease: Bacterial Mycobacterial and Spirochetal Infections Age: Child Race: Caucasian Image Type: Clinical Photograph

Lichen Planus Slide #14, "0214-Lichen planus" from Set #2 Disease: Lichen planus Age: Adult (18-60) Notes: Lichen planus involving the buccal mucosa with whitish reticulum in a 30-year-old man affected by chronic active hepatitis C.

Myxoid Cyst Slide #47, "1247-Myxoid Cyst" from Set #12 Class: Cutaneous Neoplasms Disease: Benign Bony and Soft Tissue Proliferations Age: Adult (18-60) Race: Caucasian Image Type: Clinical Photograph

Cutaneous Horn Cutaneous horn

Dystrophic Epidermolysis Bullosa Slide #43, "1243-Dystrophic Epidermolysis Bullosa" from Set #12 Class: Inflammatory and Metabolic Disorders Class 2: Miscellaneous Disorders and Other Topics Disease: Blistering Disorders Disease 2: Heritable/Congenital Disorders and Miscellaneous S Age: Unknown Race: Caucasian Image Type: Clinical Photograph